[android-common:android12-kiwi-5.10 278/278] kernel/power/swap.c:645: warning: Function parameter or member 'data' not described in 'compress_threadfn'

[android-common:android12-kiwi-5.10 278/278] kernel/power/swap.c:645: warning: Function parameter or member 'data' not described in 'compress_threadfn'

[kernel test robot]

Hi Nikhil,

FYI, the error/warning was bisected to this commit, please ignore it if it's irrelevant.

tree:   https://android.googlesource.com/kernel/common android12-kiwi-5.10
head:   ae917b3c7332e08006443a49c261aa97ce703103
commit: 31414b7c10febdb2006bacd5de9de2f63785ac58 [278/278] BACKPORT: PM: hibernate: Rename lzo* to make it generic
config: x86_64-rhel-9.4-rust (https://download.01.org/0day-ci/archive/20260903/202609031533.Xz9C8rZL-lkp@intel.com/config)
compiler: clang version 24.0.0git (https://github.com/llvm/llvm-project 2c2cffa015e9549aafba9e514384b08204c7cc4b)
reproduce (this is a W=1 build): (https://download.01.org/0day-ci/archive/20260903/202609031533.Xz9C8rZL-lkp@intel.com/reproduce)

If you fix the issue in a separate patch/commit (i.e. not just a new version of
the same patch/commit), kindly add following tags
| Reported-by: kernel test robot <lkp@intel.com>
| Closes: https://lore.kernel.org/oe-kbuild-all/202609031533.Xz9C8rZL-lkp@intel.com/

All warnings (new ones prefixed by >>):

   kernel/power/swap.c:95: warning: cannot understand function prototype: 'struct swap_map_handle '
   kernel/power/swap.c:122: warning: cannot understand function prototype: 'struct swsusp_extent '
   kernel/power/swap.c:177: warning: Function parameter or member 'swap' not described in 'alloc_swapdev_block'
   kernel/power/swap.c:197: warning: Function parameter or member 'swap' not described in 'free_all_swap_pages'
   kernel/power/swap.c:541: warning: Function parameter or member 'handle' not described in 'save_image'
   kernel/power/swap.c:541: warning: Function parameter or member 'snapshot' not described in 'save_image'
   kernel/power/swap.c:541: warning: Function parameter or member 'nr_to_write' not described in 'save_image'
   kernel/power/swap.c:585: warning: cannot understand function prototype: 'struct crc_data '
   kernel/power/swap.c:601: warning: Function parameter or member 'data' not described in 'crc32_threadfn'
   kernel/power/swap.c:627: warning: cannot understand function prototype: 'struct cmp_data '
>> kernel/power/swap.c:645: warning: Function parameter or member 'data' not described in 'compress_threadfn'
   kernel/power/swap.c:891: warning: Function parameter or member 'nr_pages' not described in 'enough_swap'
   kernel/power/swap.c:958: warning: Function parameter or member 'handle' not described in 'release_swap_reader'
   kernel/power/swap.c:1062: warning: Function parameter or member 'handle' not described in 'load_image'
   kernel/power/swap.c:1062: warning: Function parameter or member 'snapshot' not described in 'load_image'
   kernel/power/swap.c:1062: warning: Function parameter or member 'nr_to_read' not described in 'load_image'
   kernel/power/swap.c:1114: warning: cannot understand function prototype: 'struct dec_data '
>> kernel/power/swap.c:1131: warning: Function parameter or member 'data' not described in 'decompress_threadfn'
   kernel/power/swap.c:1567: warning: Function parameter or member 'mode' not described in 'swsusp_close'


vim +645 kernel/power/swap.c

081a9d043c983f1 Bojan Smojver  2011-10-13  640  
081a9d043c983f1 Bojan Smojver  2011-10-13  641  /**
081a9d043c983f1 Bojan Smojver  2011-10-13  642   * Compression function that runs in its own thread.
081a9d043c983f1 Bojan Smojver  2011-10-13  643   */
31414b7c10febdb Nikhil V       2024-01-22  644  static int compress_threadfn(void *data)
081a9d043c983f1 Bojan Smojver  2011-10-13 @645  {
081a9d043c983f1 Bojan Smojver  2011-10-13  646  	struct cmp_data *d = data;
081a9d043c983f1 Bojan Smojver  2011-10-13  647  
081a9d043c983f1 Bojan Smojver  2011-10-13  648  	while (1) {
981a31b7547af42 Hongchen Zhang 2023-11-16  649  		wait_event(d->go, atomic_read_acquire(&d->ready) ||
081a9d043c983f1 Bojan Smojver  2011-10-13  650  		                  kthread_should_stop());
081a9d043c983f1 Bojan Smojver  2011-10-13  651  		if (kthread_should_stop()) {
081a9d043c983f1 Bojan Smojver  2011-10-13  652  			d->thr = NULL;
081a9d043c983f1 Bojan Smojver  2011-10-13  653  			d->ret = -1;
981a31b7547af42 Hongchen Zhang 2023-11-16  654  			atomic_set_release(&d->stop, 1);
081a9d043c983f1 Bojan Smojver  2011-10-13  655  			wake_up(&d->done);
081a9d043c983f1 Bojan Smojver  2011-10-13  656  			break;
081a9d043c983f1 Bojan Smojver  2011-10-13  657  		}
081a9d043c983f1 Bojan Smojver  2011-10-13  658  		atomic_set(&d->ready, 0);
081a9d043c983f1 Bojan Smojver  2011-10-13  659  
081a9d043c983f1 Bojan Smojver  2011-10-13  660  		d->ret = lzo1x_1_compress(d->unc, d->unc_len,
31414b7c10febdb Nikhil V       2024-01-22  661  					  d->cmp + CMP_HEADER, &d->cmp_len,
081a9d043c983f1 Bojan Smojver  2011-10-13  662  		                          d->wrk);
981a31b7547af42 Hongchen Zhang 2023-11-16  663  		atomic_set_release(&d->stop, 1);
081a9d043c983f1 Bojan Smojver  2011-10-13  664  		wake_up(&d->done);
081a9d043c983f1 Bojan Smojver  2011-10-13  665  	}
081a9d043c983f1 Bojan Smojver  2011-10-13  666  	return 0;
081a9d043c983f1 Bojan Smojver  2011-10-13  667  }
f996fc9671d088b Bojan Smojver  2010-09-09  668  

:::::: The code at line 645 was first introduced by commit
:::::: 081a9d043c983f161b78fdc4671324d1342b86bc PM / Hibernate: Improve performance of LZO/plain hibernation, checksum image

:::::: TO: Bojan Smojver <bojan@rexursive.com>
:::::: CC: Rafael J. Wysocki <rjw@sisk.pl>

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https://github.com/intel/lkp-tests/wiki